What western state grows barley oats hay and potatoes?

Many western states grow barley, oats, hay, and potatoes. To narrow it down, you'd need to tell me what criteria you're looking for, for example:

* Which state grows the most of these crops?

* Which state has the largest acreage dedicated to these crops?

* Which state has the most diverse agricultural economy, including these crops?

Once you tell me what you're looking for, I can give you a more specific answer!